5. Key Points: Merits & Demerits (Aircraft Context)

Try these first

1. 1.

   What is the primary advantage of using air as a refrigerant?

   Hint

   Think about the properties of air compared to traditional refrigerants.

2. 2.

   What drawback does air refrigeration present compared to vapor-compression systems?

   Hint

   Consider what COP measures in refrigeration systems.

3. 3.

   What is one major merit of air refrigeration systems in aircraft?

   • High efficiency
   • Lightweight design
   • Complexity

   Hint

   Think about the benefits of reducing weight in aviation.

4. 4.

   True or False: Air refrigeration systems can achieve lower temperatures than vapor-compression systems.

   • True
   • False

   Hint

   Reflect on the capacity for cooling of different systems.

5. 5.

   Evaluate a scenario where an aircraft must operate under extremely low temperatures. Discuss how air refrigeration limitations could impact the system’s performance?

   Hint

   Consider performance requirements for aircraft under low-temperature conditions.

6. 6.

   Design an experimental project focusing on enhancing the efficiency of an air refrigeration system. What variables would you examine?

   Hint

   Think about the factors affecting the thermal efficiency and work input.